EP 1349148 B1 20130313 - Method and apparatus for noise estimation within an audio signal
Title (en)
Method and apparatus for noise estimation within an audio signal
Title (de)
Verfahren und Vorrichtung zur Rauschschätzung in einem Tonsignal
Title (fr)
Procédé et dispositif d'estimation du bruit dans un signal audio
Publication
Application
Priority
- JP 0111560 W 20011227
- JP 2000401578 A 20001228
Abstract (en)
[origin: EP1349148A1] An apparatus for noise suppression has a converter for converting an input signal into a frequency-domain, an SNR calculator for determining a signal-to-noise ratio (SNR) using the frequency-domain signal, a spectral gain generator for determining a spectral gain based on the SNR, a spectral gain modification unit for correcting the spectral gain to determine a modified spectral gain, a multiplier for weighting the frequency-domain signal using the modified spectral gain, and an inverse converter for converting the weighted frequency-domain signal into a signal in a time-domain signal. In the apparatus for noise suppression, it is preferable to calculate a weighted noisy speech power spectrum from the power spectrum of noisy speech and the power spectrum of estimated noise thereby determining an SNR. <IMAGE>
IPC 8 full level
G10L 15/20 (2006.01); G10L 19/02 (2013.01); G10L 21/02 (2013.01); G10L 21/0208 (2013.01); G10L 21/0232 (2013.01); G10L 21/0264 (2013.01); G10L 25/18 (2013.01); H03H 21/00 (2006.01); H03M 7/30 (2006.01); H04B 1/10 (2006.01)
CPC (source: EP KR US)
G10L 21/0208 (2013.01 - EP KR US); G10L 21/0232 (2013.01 - KR); H03H 21/0012 (2013.01 - EP KR US); G10L 21/0232 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1349148 A1 20031001; EP 1349148 A4 20080521; EP 1349148 B1 20130313; CA 2433551 A1 20020711; CN 100492493 C 20090527; CN 101042871 A 20070926; CN 1493073 A 20040428; JP 2002204175 A 20020719; JP 4282227 B2 20090617; KR 100778565 B1 20071122; KR 100799780 B1 20080131; KR 20030066784 A 20030809; KR 20060053022 A 20060519; US 2004049383 A1 20040311; US 7590528 B2 20090915; WO 02054387 A1 20020711
DOCDB simple family (application)
EP 01272541 A 20011227; CA 2433551 A 20011227; CN 01822846 A 20011227; CN 200610163737 A 20011227; JP 0111560 W 20011227; JP 2000401578 A 20001228; KR 20037008850 A 20030628; KR 20067007627 A 20060420; US 45114103 A 20030627